We all have a problem-solving toolkit in our heads. But sometimes, you may come across a brain teaser that stumps you. In this case, it helps to look at it from a different angle instead of going ...

Every Sunday, NPR host Will Shortz, The New York Times' crossword puzzle guru, gets to quiz thousands of listeners in a long-running segment called the Sunday Puzzle. While written to be solvable ...

If you love testing your mind then it’s the perfect time of year as the annual GCHQ Christmas quiz has been released. The UK's intelligence, security and cyber agency creates a Christmas Challenge ...